import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class CardList {
    private static final String[] suits= {"♤","♡","♢","♧"};
    public static List<Card> buyCards(){
        List<Card> list = new ArrayList<>();
        for (int i = 0; i < suits.length; i++) {
            for (int j = 1; j <=13 ; j++) {
                Card card = new Card(suits[0],j);
                list.add(card);
            }
        }
        return list;
    }

    public static void shuffle(List<Card>list){
        Random random = new Random();
        for (int i =list.size()-1; i>0 ; i--) {
            int index = random.nextInt(i);
            swap(list,i,index);
        }
    }

    public static void swap(List<Card>list,int i ,int j){
        Card tmp = list.get(i);
        list.set(i,list.get(j));
        list.set(j,tmp);
    }

    public static void main(String[] args) {
        List<Card>list = buyCards();
        System.out.println(list);
        shuffle(list);
        System.out.println(list);
        List<List<Card>> hand = new ArrayList<>();
        List<Card>hand1 = new ArrayList<>();
        List<Card>hand2 = new ArrayList<>();
        List<Card>hand3 = new ArrayList<>();
        hand.add(hand1);
        hand.add(hand2);
        hand.add(hand3);
        for (int i = 0; i <5 ; i++) {
            for (int j = 0; j <3; j++) {
                Card card = list.remove(0);
                hand.get(j).add(card);
            }
        }
        System.out.println("第一个人的牌"+hand.get(0));
        System.out.println("第二个人的牌"+hand.get(1));
        System.out.println("第三个人的牌"+hand.get(2));
    }
}